Asteroid 21545, Koirala, was discovered August 17, 1998 by the Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team at Socorro, New Mexico. It has a period of 5 years, 107 days.
It was named for Storrs, Connecticut high school student Pratistha Koirala (born 1988), a native of Nepal who got second place in the 2006 Intel International Science and Engineering Fair for her botany project, "Monitoring the Expression of AVP1 in Arabidopsis thaliana Tissue." (Arabidopsis thaliana, a small flowering plant native to Eurasia commonly known as thale cress, mouse-ear cress or arabidopsis and related to the mustard and cabbage plants, is often used as a model organism in plant biology and genetics.)
The meaning of asteroid Koirala seems to be living under oppression; other possibilities are plant biology, genetics, cancer research and oncology.